--- a/commitwatcher/agent.py	Fri Sep 27 11:17:27 2013 -0700
+++ b/commitwatcher/agent.py	Fri Sep 27 13:03:40 2013 -0700
@@ -4,16 +4,17 @@
 
 import feedparser
 from .commit import Commit
+from .store import MemoryStore
 
 class Agent(object):
     """abstract base class"""
 
-    def __init__(self, repository, store):
+    def __init__(self, repository, store=None):
         """
         repository -- repo to monitor
         """
         self.repository = repository
-        self.store = store
+        self.store = MemoryStore() if store is None else store
 
 
 class LocalCheckoutAgent(object):